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# ========================================================================== #
# #
# KVMD - The main Pi-KVM daemon. #
# #
# Copyright (C) 2020 Maxim Devaev <[email protected]> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation, either version 3 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program. If not, see <https://www.gnu.org/licenses/>. #
# #
# ========================================================================== #
import contextlib
from typing import Dict
from typing import AsyncGenerator
from typing import Union
import aiohttp
from .. import make_user_agent
# =====
class KvmdError(Exception):
def __init__(self, err: Union[Exception, str]) -> None:
if isinstance(err, Exception):
super().__init__(f"{type(err).__name__}: {err}")
else:
super().__init__(err)
# =====
class _BaseClientPart:
def __init__(
self,
host: str,
port: int,
unix_path: str,
timeout: float,
) -> None:
assert port or unix_path
self.__host = host
self.__port = port
self.__unix_path = unix_path
self.__timeout = timeout
def _make_url(self, handle: str) -> str:
assert not handle.startswith("/"), handle
return f"http://{self.__host}:{self.__port}/{handle}"
def _make_session(self, user: str, passwd: str) -> aiohttp.ClientSession:
kwargs: Dict = {
"headers": {
"X-KVMD-User": user,
"X-KVMD-Passwd": passwd,
"User-Agent": make_user_agent("KVMD-VNC"),
},
"timeout": aiohttp.ClientTimeout(total=self.__timeout),
}
if self.__unix_path:
kwargs["connector"] = aiohttp.UnixConnector(path=self.__unix_path)
return aiohttp.ClientSession(**kwargs)
class _AuthClientPart(_BaseClientPart):
async def check(self, user: str, passwd: str) -> bool:
try:
async with self._make_session(user, passwd) as session:
async with session.get(self._make_url("auth/check")) as response:
response.raise_for_status()
if response.status == 200:
return True
raise KvmdError(f"Invalid OK response: {response.status} {await response.text()}")
except aiohttp.ClientResponseError as err:
if err.status in [401, 403]:
return False
raise KvmdError(err)
except aiohttp.ClientError as err:
raise KvmdError(err)
class _StreamerClientPart(_BaseClientPart):
async def set_params(self, user: str, passwd: str, quality: int, desired_fps: int) -> None:
try:
async with self._make_session(user, passwd) as session:
async with session.post(
url=self._make_url("streamer/set_params"),
params={"quality": quality, "desired_fps": desired_fps},
) as response:
response.raise_for_status()
except aiohttp.ClientError as err:
raise KvmdError(err)
# =====
class KvmdClient(_BaseClientPart):
def __init__(
self,
host: str,
port: int,
unix_path: str,
timeout: float,
) -> None:
kwargs: Dict = {
"host": host,
"port": port,
"unix_path": unix_path,
"timeout": timeout,
}
super().__init__(**kwargs)
self.auth = _AuthClientPart(**kwargs)
self.streamer = _StreamerClientPart(**kwargs)
@contextlib.asynccontextmanager
async def ws(self, user: str, passwd: str) -> AsyncGenerator[aiohttp.ClientWebSocketResponse, None]:
try:
async with self._make_session(user, passwd) as session:
async with session.ws_connect(self._make_url("ws")) as ws:
yield ws
except aiohttp.ClientError as err:
raise KvmdError(err)
|
